State Henry’s law and mention two of its important applications.
The relationship between pressure and solubility is guided by Henry’s law. According to this law, “The mass of a gas dissolved in given volume of the liquid at a constant temperature depends upon the pressure which is applied.” It can also be stated as the partial pressure of the gas in vapour phase (p) is proportional to the mole fraction of the gas (χ) in the solution.
where = Henry’s constant.
Applications of Henry’s Law :
(i) To increase the solubility of CO2 in soda water and soft drinks, the bottle is sealed under high pressure.
(ii) At high altitude, low blood oxygen causes climber to become weak and make them unable to think clearly, which are symptoms of a condition known as anoxia.
where = Henry’s constant.
Applications of Henry’s Law :
(i) To increase the solubility of CO2 in soda water and soft drinks, the bottle is sealed under high pressure.
(ii) At high altitude, low blood oxygen causes climber to become weak and make them unable to think clearly, which are symptoms of a condition known as anoxia.
Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with oxalic acid ?
Write the ionic equations for the reactions.
(i) Write the colligative property which is used to find the molecular mass of macromolecules.
(ii) In non-ideal solution, what type of deviation shows the formation of minimum boiling azeotropes?
How many electrons flow when a current of 5 amps is passed through a solution for 193 sec ? Given F = 96500 C. \(N_0\) = 6.002 × \(10^{23}\) \(mol^{-1}\).
The conductivity of 0.20 M solution of KCl at 298 K is 0.025 Scm⁻¹. Calculate its molar conductivity.
Why a mixture of Carbon disulphide and acetone shows positive deviation from Raoult’s law? What type of azeotrope is formed by this mixture?
Define the following terms:
(i) Abnormal molar mass
(ii) van’t Hoff factor
What is meant by rate of a reaction ? Differentiate between average rate and instantaneous rate of a reaction.